Concepts: belfry, bell, tower
A: tower of an ancient belfry with a bell and a modern clock
Concepts: atom, nucleus, number, proton
A: number of protons in the nucleus of an atom
Concepts: moon, silhouette, tree
A: large full moon with the silhouette of an oak tree
Concepts: earth, space, sun
A:
earth orbiting the sun as if seen from space